0
What else can I help you with?
What is the difference between a key and a superkey in DBMS?
I am supposing that key means primary key.Superkey is any subset of attributes that uniquely identifies the tuples of a relation. This subset need not be minimal, that is, one can remove some attributes from it and it is still uniquely identifying. If all redundant attributes are removed you get a subset what is called primary key.
What is a simple attribute in dbms?
database simple attritbute
What value is the one that a DBMS initially displays in a field?
a default value
What is the basic difference between RDBMS and DBMS?
DBMS acronym for Database management system. There are number of DBMS like RDBMS, ORDBMS, HRDBMS etc . RDBMS is basically to define relationship between the tales and also it follows various codds rules.
What do you mean by functional dependancy in dbms?
Dependency means that the one entity dependents on another entity. This is also applicable for the Function also. For Example : If you trying to check the general function which tells you about the rooms availability, which consist of checkFreeRooms() and we can have the checkForACRooms() and CheckForSuits(), So the general function for checking Rooms dependents on the other rooms as above
What is the cordinality of dbms?
the number of tuple in a relation is called the cordinality of a relation?
What is the Difference between relation schema and relation instance?
difference between relation sehema and relation instance in dbms
What is bcnf explain with respect to dbms?
Boyce -Codd normal form which is one of the forms of dbms noramlizations.normalization is converting the relations or tables in a standard form.bcnf is based on functional dependencies that take into account all candidate keys.a relation is in bcnf if every determinant has a candidate key..:)
Give entity relation diagram for hospital system in dbms?
d_id,d_name
How many types of normal forms in DBMS?
total 6 normal forms
Why DBMS is important?
Minimal Data RedundancyConsistency of DataIntegration of DataSharing of DataData independenceEase of Application Development
Why relation have key in DBMS?
A software system that facilitates the creation and maintenance and use of an electronic database
What do you mean by degree in DBMS?
It is the number of attribute of its relation schema. Its is an association among two or more entities..
What is relation instance in DBMS?
In DBMS, a relation instance refers to a particular set of data rows within a database table at a given point in time. It represents the actual values stored in the database for that specific table. Each row in a relation instance corresponds to a record or tuple within the table, containing values for each attribute.
What is the difference between a key and a superkey in DBMS?
I am supposing that key means primary key.Superkey is any subset of attributes that uniquely identifies the tuples of a relation. This subset need not be minimal, that is, one can remove some attributes from it and it is still uniquely identifying. If all redundant attributes are removed you get a subset what is called primary key.
When would it make sense not to use a DBMS?
It may not make sense to use a database management system (DBMS) if your data storage needs are minimal, you have limited resources, or if you require a simple and lightweight solution. In these cases, using flat files or spreadsheets could be more practical and cost-effective than implementing a full-fledged DBMS.
What is decomposition in dbms?
Decomposition in database management refers to the process of breaking down a relation schema into smaller, more manageable schemas called normal forms to reduce data redundancy and improve data integrity. This helps in organizing data more efficiently and makes it easier to maintain and query the database.
